Abstract:

Community, as a structure connecting ecosystem and individuals, is considered an important part of ecology. Different species and development stages in the research were used in our classification to the sampling stations with clustering analysis and multi dimension scaling, through which three geographic communities were illuminated: Salp community dominated by Salp thompni in northern area; Near shore community dominated by Euphausia crystallorophias in the south; and Krill community located between the two communities above. Indicator species method was then used between each two communities to find out which species or stages differ most. Results show: Rhincalanus gigas , adult Cheatognath, late stages of Metridia gerlachei and calyptopis of Euphausiidae are indicators between Salp and Near shore community; between Krill and Salp community the indicators are Salp thompni , adult and larvae of cheatognath and R.gigas ; the most notable indicator between Krill and Near shore community was E. crystallorophias, then nuaplii of Euphausiidae and Onceae conifera .